composition.js

const swimmer = (state) => ({
  swim: () => console.log(state.name, 'is swimming')
})

const eater = (state) => ({
  eat: () => console.log(state.name, 'is eating')
})

const sleeper = (state) => ({
  sleep: () => console.log(state.name, 'is sleeping')
})

const flyer = (state) => ({
  fly: () => console.log(state.name, 'is flying')
})

const clucker = (state) => ({
  cluck: () => console.log(state.name, 'is clucking')
})

const quacker = (state) => ({
  quack: () => console.log(state.name, 'is quacking')
})

const Duck = (name) => {
  let state = {
    name
  };
  return Object.assign(
    {},
    swimmer(state),
    eater(state),
    sleeper(state),
    flyer(state),
    quacker(state)
  );
}

const RubberDuck = (name) => {
  let state = {
    name
  };
  return Object.assign(
    {},
    swimmer(state),
    quacker(state)
  );
}

Duck('SirQuack').quack();
RubberDuck('Ducky').swim();